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Updated: Jun 25, 2026
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
Published on: August 30, 2016
Control and calibration of multi-segment reaching movements
1Ashton Graybiel Spatial Orientation Laboratory, Brandeis University, MS033, Waltham, MA 02454-9110, USA. lackner@brandeis.edu
Advances in Experimental Medicine and Biology
|February 21, 2009
Summary
Equilibrium point theories offer insights into movement control but require precise experimental validation. Further research is needed to firmly establish their exact contribution to motor regulation.
Area of Science:
- Neuroscience
- Motor Control
- Biomechanics
Background:
- Anatol Feldman's equilibrium point theory, introduced in the 1960s, has evolved dynamically.
- The theory challenges the scientific community to develop quantitative experimental methods for studying posture and movement.
Purpose of the Study:
- To analyze various equilibrium point theories and their supporting evidence.
- To evaluate the precision of research questions and appropriateness of methods used in motor control studies.
Main Methods:
- Comparison of studies using mechanical, contacting perturbations versus non-contacting, inertial perturbations.
- Analysis of studies involving deafferented subjects and intact humans with specific instructions.
- Examination of factors influencing movement dynamics prediction from isometric conditions.
Main Results:
- Critical studies on reaching behavior may conflate grip force adjustments with arm movement recalibration.
- The precise role of equilibrium point control in movement regulation remains to be definitively established.
Conclusions:
- Equilibrium point theories have significantly advanced the field of motor control.
- Feldman's work has inspired extensive research, expanding our understanding of motor function.
